DKDP

DKDP, or potassium dideuterium phosphate, is a nonlinear optical crystal. Its chemical formula is KD2PO4. It is a type of phosphate crystal that is a deuterated analog of potassium dihydrogen phosphate (KDP). The substitution of deuterium for hydrogen in the crystal lattice significantly alters its properties. Specifically, DKDP exhibits a higher nonlinear optical coefficient and a lower half-wave voltage compared to KDP. These characteristics make it advantageous for applications requiring efficient frequency doubling or other nonlinear optical processes.

DKDP crystals are commonly used in electro-optic modulators, Q-switches for lasers, and frequency conversion devices. The electro-optic effect in DKDP allows for the modulation of light by applying an electric field. Its ability to withstand high optical power densities and its relatively large aperture size are also beneficial for laser systems. The crystal is grown from aqueous solutions under controlled conditions to achieve high optical quality. Like KDP, DKDP is birefringent and exhibits piezoelectric properties. It is sensitive to temperature changes, and its optical properties are temperature-dependent. Proper temperature control is often necessary for optimal performance in sensitive optical applications. DKDP is a well-established material in the field of nonlinear optics and continues to be used in various scientific and technological applications.